Mine went back on the 12th August here. Still seems a little bit hard to get used to even after 3 years that whilst everyone is on hols in the UK - he is back to school in the middle of August.
Didn't have 10 weeks though, thank the lord, just 6.
I managed to get two consecutive weeks off this summer and it was just lovely to spend time together....stretching your holidays over the Swiss school hols isn't easy - and I feel guilty if I can't at least take a little bit of time over every school holiday, but it doesn't really leave you much for yourself!
Today is back to school day. We've had 10 weeks off and I've just dropped my Ds1 and Ds2 off at school. Now I feel at a bit of a loose end! Flat needs tidying and balcony is a tip but instead I'm mumsnetting and enjoying the peace. I'm happy they are at school but at the same time I miss them.